DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Framing and Foundation > Reinforcing subfloor in 1970s house




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 06-18-2008, 10:07 PM  
ChrWright
Builder/Remodeler
 
ChrWright's Avatar
 
Join Date: Jan 2008
Location: Indianapolis, IN
Posts: 14
Send a message via Skype™ to ChrWright
Default

I agree. It won't be fun, but adding joists from underneath is the only thing that will prevent deflection in this floor.

2x6, 16" o.c.



__________________

Christopher Wright, CR - WrightWorks, LLC - Named to the 2010 REMODELING Big50
[URL="http://www.WrightWorks.net"]www.WrightWorks.net[/URL] [URL="http://wrightworks.net/Company-Info.htm"]Indianapolis Remodeling Contractor[/URL] [URL="http://www.facebook.com/WrightWorks"]Facebook[/URL] [URL="http://twitter.com/ChrWright"]Twitter[/URL] [URL="http://www.formspring.me/ChrWright"]Formspring.me[/URL]
[B]"When we build, let us think that we build forever."[/B] --John Ruskin

ChrWright is offline  
 
Reply With Quote Quick reply to this message
Old 12-09-2009, 12:18 AM  
juryduty
Junior Member
 
Join Date: Mar 2008
Posts: 6
Default

Hi folks,
Sorry to resurrect this old thread, but I am finally going to have a new floor put into the bathroom of this house. My contractor says he can put in 2x6 joists every 16" to reinforce the bathroom floor, and is installing marble. Again the floor is framed with 4x8s on 48" centers with 1.125" plywood. Will this be strong enough for marble over concrete backerboard once the additional 2x6's are installed?

Thanks for any clues!



__________________
juryduty is offline  
 
Reply With Quote Quick reply to this message
Old 12-10-2009, 10:21 PM  
GBR
Senior Member
 
Join Date: Mar 2009
Posts: 337
Liked 18 Times on 17 Posts
Likes Given: 9

Default

http://www.trioforest.com/pdf/Load-Span_Tables.pdf
Be safe, Gary And get a 6mil. vapor barrier on that, dirt? And insulate the floor or the concrete walls if closed crawl: http://www.eere.energy.gov/buildings/building_america/pdfs/db/35379.pdf
__________________

Last edited by GBR; 12-10-2009 at 10:27 PM.
GBR is offline  
 
Reply With Quote Quick reply to this message
Old 05-03-2010, 08:53 PM  
btw
Junior Member
 
Join Date: May 2010
Posts: 4
Default Similar issue

Hello,
I have the same subfloor as the person above except that I have 2x4 or 2x6 tongue and groove. I need to go down and measure it again. Anyway, I want to install a 90 gallon aquarium. The spot for the aqaurium actually falls in between the two floor joists. Should I install another floor joist? If so, do I have to pour concrete columns; how deep do you dig or can I buy post jacks from home depot?

__________________
btw is offline  
 
Reply With Quote Quick reply to this message
Old 05-05-2010, 11:52 AM  
btw
Junior Member
 
Join Date: May 2010
Posts: 4
Default need to reinforce for aquarium

I have the same subfloor. I need to reinforce for a 90 gallon aquarium; which is about 1,000 lbs. What is the best way to reinforce this. I've had a couple guys take a look at it and they suggested reinforcing the footprint of the aqurium underneath with 4x6 beams and pillars. Do I need to tie this into the existing beams or do I just reinforce the aquarium footprint underneath which is 4'x1.5'. Could somebody point me to a good book or some detailed instructions for how to accomplish this?

__________________
btw is offline  
 
Reply With Quote Quick reply to this message
Old 10-23-2010, 01:36 PM  
longboard
Junior Member
 
Join Date: Oct 2010
Location: Monterey, California
Posts: 1
Default Reinforcing Floor Deflection

I too have the same type floor and have been under it many times to put in 2x6 joists between the 4 foot beams. I also added some 2x6 blocking in between the added 2x6 for additional support. I used joist hangers and no compressor. I have only 18-24 inches under most of my subfloor and I am almost 60 and it is a pain. If you really don't want to get under your house and you don't have a finished floor yet, you can cut your existing subfloor from the top where it is nailed to your existing beams. With the subfloor removed and the crawspace open, you can easily add your new 2x6 joists from above and then replace your subfloor.

Hope this helps.

__________________
longboard is offline  
 
Reply With Quote Quick reply to this message
Old 11-07-2010, 10:41 PM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 9,462
Liked 748 Times on 668 Posts
Likes Given: 1306

Default

crawl under there and add one 2x6 between the joists with hangers. go upstairs and jump on it. then you will feel the difference. From top down would be a waist of time and money.



__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Patio roof to house attachment question mobilemike Roofing and Siding 2 09-23-2008 07:31 AM
New foundation, old house Begreen Framing and Foundation 46 08-05-2007 12:19 PM
House On Slab Leaks NIGHTMARE Extrinsicdin Bricks, Masonry and Concrete 2 03-16-2007 04:07 PM
Leaking house on slab NIGHTMARE Extrinsicdin Framing and Foundation 2 03-16-2007 12:04 AM
River rock around house. Mudball General Home Improvement Discussion 2 06-16-2006 04:29 PM